Eksploatacyjne zużycie tribologiczne cylindrów doładowanego Silnika wysokopprężnego wynikające z właściwości materiałowych jego żeliwnego bloku

Abstract

The chemical composition, metallographic structure, graphite form and hardness of cast iron cylinders in 1.6D Turbo Diesel engine block powering a Polonez FSO car, after a very small run of 5762 km were shown. The accuracy of dimension and shape as well as the topography of the surface of its cylinders are also provided. A different value of abrasive wear of cylinders 1, 2, 3 was found in comparison with cylinder 4. The lower tribological wear of cylinder 4 resulted from its higher hardness caused by pearlite dispersion and more favorable shape of gray iron graphite particles, as compared to cylinders 1, 2 and 3 shown. This occurred for a similar geometric structure of the surface of the coated cylinders at a slightly higher height surface roughness of the fourth cylinder.